This is unfortunate, but also makes complete sense. There is no point in competing against Gutenberg. I think the smart move now is to beging building tools on top of Gutenberg, not tools which compete against it.

I remember seeing Tailor back when it was brand new in the repository and sending in a few patches. It was by far the most promising looking of the page building tools out there. I think Pippin was being generous even putting those other two in the same category.

What Tailor lacked in features, it made up for with logic and forward thinking. Gutenberg will be a worthy replacement though.